A no-contact advisory for the Grand River downstream of 144th Avenue in Grand Haven Township was issued Monday afternoon after treated wastewater that had not been disinfected flowed into the river from the River Haven Mobile Home Park treatment facility.

Ottawa County Environmental Health Director Adam London said the advisory was issued Monday afternoon after the health department learned that an unknown quantify of wastewater entered the Grand River from the River Haven Mobile Home Park, located west of 144th Avenue and south of Mercury Drive.

London said the trailer park typically discharges 50,000 to 55,000 gallons of treated and disinfected wastewater into the Grand River over a 24-hour period. Because health officials did not know how long improperly-treated wastewater had been flowing into the river, they issued a precautionary no-contact advisory.

London said officials with the Michigan Department of Environmental Quality were working with the trailer park's owners, Sun Communities Inc. of Southfield. The DEQ officer assigned to the case was not available for comment Monday afternoon.

But according to Sun Communities officials, improperly treated wastewater was discharged into the Grand River for only three hours and the problem at the park's treatment facility has been resolved.

Sun officials said sewage generated at the 721-unit River Haven Mobile Home Park is treated on site before being discharged into the Grand River. According to a press release issued Monday night, equipment in the treatment facility was taken "off line" for about three hours Monday.

"During this time a minimal amount of secondary effluent, (treated but not disinfected), was discharged to the Grand River," the release stated. "The disinfection equipment has been placed back on line and is fully operational."